Re: Subclassing a GObject in Typescript

[makepost firemail cc]

A generic seems appropriate, here's how you can start:

```ts
export function registerClass<T>(klass: T): T & Partial<{
  [interfaces]: any[]
  [properties]: any
  [requires]: any[]
  [signals]: any
}>`
```

Best not leave it with `any` but specify what types these properties 
should have.

_init should receive `${name}_ConstructProps` for proper checking, not 
just any object. Look for the push of "default constructor", and add the 
_init definition nearby, that should be enough.

On 2018-11-16 15:56, Tony Houghton wrote:
> I want to make ts-for-gjs work with registerClass(), but as a
> Typescript beginner I would appreciate some advice. I'm proposing to
> make it add these globals to GObject.d.ts:
>
> export function registerClass(klass: Object): Object
> export declare const interfaces: unique symbol
> export declare const properties: unique symbol
> export declare const requires: unique symbol
> export declare const signals: unique symbol
>
> Does that look OK? I'm not 100% sure that Object is the most
> appropriate type to use for registerClass' parameter and return value.
>
> GObject.Object needs this pseudo-constructor:
>
>     _init(params?:object): void
>
> but is the base class the only one that needs that, or is it
> overridden in all subclasses?
>
> When registerClass() is called, it adds the equivalent of these static
> members to the class being registered:
>
>     static [interfaces]?: any[]
>     static [properties]?: object
>     static [requires]?: any[]
>     static [signals]?: object
>
> Seeing as they're added dynamically to 3rd party classes, but aren't
> present in the introspected classes, I don't think we can actually get
> ts-for-gjs to do anything about them. Any ideas on how these could be
> made convenient to use in Typescript?
>
> --
>
> TH
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